Huawei PDU8000 - Page 124

Alarm
Name
Alarm
Severity
Impact Possible
Cause
Solutions
Main input
CT reverse
connect
Major The common
polarity
terminal and
common
terminal on a
phase current
transformer of
a mains phase
are reversely
connected.
N/A Switch cables
connected to the
common polarity
terminal and
common terminal.
Figure 8-1 uses
dual-input as an
example to show
the cable
connection for the
common polarity
terminal and
common terminal of
the current
transformer for
route I phase L1.
Main input
breaker
tripping
Critical The mains
switch has
tripped.
The back-
end is short-
circuited or
experiences
overcurrent.
Check whether the
back-end current is
short-circuited or
experiences
overcurrent.
Main input
overvoltage
Critical Input
overvoltage:
Input voltage V
> 1.2 x Rated
voltage
(Multiple: 1.05–
1.25;
conrmation
time: 2–10s).
The input
power
supply is
faulty.
Check the input
power.
Main input
undervolta
ge
Critical Input
undervoltage:
Input voltage V
< 0.85 x Rated
voltage
(Multiple: 0.75–
0.95;
conrmation
time: 2–10s).
The input
power
supply is
faulty.
Check the input
power.
Main input
overfreque
ncy
Major The input
frequency is 1.5
Hz higher than
the congured
frequency. The
frequency
setting range is
50–60 Hz.
The input
power
supply is
faulty.
Check the input
power.
PDU8000 Modular Precision PDC V2.0
User Manual 8 Maintenance Guide
Issue 04 (2021-04-13) Copyright © Huawei Technologies Co., Ltd. 117